19 Aquilae

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19 Aquilae
19 Aquilae, 2007-04-21.jpg
Image captured from Mount Laguna, California
Observation data
Epoch J2000.0      Equinox
Constellation Aquila
Right ascension 19h 08m 59.91138s[1]
Declination +06° 04′ 23.5545″[1]
Apparent magnitude (V) 5.227[2]
Characteristics
Spectral type F0 III-IV[3]
Apparent magnitude (U) 5.59 ± 0.010[4]
Apparent magnitude (B) 5.57 ± 0.007[4]
Apparent magnitude (V) 5.23 ± 0.009[4]
U−B color index +0.020[2]
B−V color index +0.345[2]
Astrometry
Radial velocity (Rv) -46.7[5] km/s
Proper motion (μ) RA: -10.40 ± 0.54[1] mas/yr
Dec.: -77.22 ± 0.39[1] mas/yr
Parallax (π) 21.84 ± 0.48[1] mas
Distance 149 ± 3 ly
(46 ± 1 pc)
Absolute magnitude (MV) 1.94[6]
Details
Surface gravity (log g) 4.13[3] cgs
Temperature 6,954[3] K
Metallicity [Fe/H] +0.03[3] dex
Rotational velocity (v sin i) 57.0[7] km/s
Age 1.3[6] years
Other designations
19 Aql, BD+5 4040, FK5 3530, HD 178596, HIP 94068, HR 7266, SAO 124318.[4]

19 Aquilae is the Flamsteed designation for a star in the equatorial constellation of Aquila. It has an apparent visual magnitude of 5.23[2] and is about 149 light-years (46 parsecs) distant from the Earth.[1]

References[edit]

  1. ^ a b c d e f van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357. 
  2. ^ a b c d Oja, T., "UBV photometry of stars whose positions are accurately known. III", Astronomy and Astrophysics Supplement Series 65 (2): 405–4. 
  3. ^ a b c d Balachandran, Suchitra (May 1, 1990). "Lithium depletion and rotation in main-sequence stars". Astrophysical Journal, Part 1 354: 310–332. Bibcode:1990ApJ...354..310B. doi:10.1086/168691. 
  4. ^ a b c d "19 Aql -- Variable Star", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-07-25. 
  5. ^ Wielen, R. et al. (1999), Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions (35), Astronomisches Rechen-Institut Heidelberg, Bibcode:1999VeARI..35....1W. 
  6. ^ a b Holmberg, J.; Nordström, B.; Andersen, J. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191. 
  7. ^ Schröder, C.; Reiners, A.; Schmitt, J. H. M. M. (January 2009), "Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo", Astronomy and Astrophysics 493 (3): 1099–1107, Bibcode:2009A&A...493.1099S, doi:10.1051/0004-6361:200810377.